On this project, the controlling condition is the project condition shows that routine moisture is expected behind ceramic tile. Which tile substrate should be selected?
Correct Answer
D) Use cementitious or specified tile backer
cementitious or specified tile backer best matches the stated condition. The other choices are real construction options in the same family, but they fit different field conditions.
Why This Is the Correct Answer
cementitious or specified tile backer best matches the stated condition. The other choices are real construction options in the same family, but they fit different field conditions.
Why the Other Options Are Wrong
Option A: Use untreated paper-faced gypsum board
Use untreated paper-faced gypsum board addresses a neighboring field issue, but not the condition or method control required for wet tile substrate.
Option B: Use regular gypsum sheathing
Use regular gypsum sheathing addresses a neighboring field issue, but not the condition or method control required for wet tile substrate.
Option C: Use painted gypsum board without backer membrane
Use painted gypsum board without backer membrane addresses a neighboring field issue, but not the condition or method control required for wet tile substrate.
Memory Technique
The field condition asks; wet tile substrate answers in work boots for Manager Checking.
Reference Hint
Open-book path: tab Principles and Practices of Commercial Construction, 10th Edition to Interior finish materials; tile backer and wet-area substrate selection; verify the construction method, material selection, equipment choice, or work sequence that fits the field condition.
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